Electrical plug connecter



' Feb. 7, 1928. 1,658,522

A. J. FRoGUE ET AL ELECTRICALPLUG CONNECTER I Filed June s3| 1925 d fdame .[.60 /7,.

5y /4 ATT-ORNEY Patented Feb. 7, 1928.

UNITED STATES PATENT OFFICE.

ARTHUR J'. FROGUE AND JAMES I. SLOAN, OF KANSAS CITY, MISSOURI,ASSIGNORS TO ALBERT R. JONES, OF KANSAS CITY, MISSOURI.

ELECTRICAL :PLUG CONNECTER.

Application led June 8,

This invention relates to an electrical plug connecter' for connecting acontact to an electrical conductor wires that the wire can be pluggedinto a socket. l

The primary object of the invention is to preventslipping ordisengagement of the end of the Wire from the contact in the plug, andthe invention consists in certain novel partsl` all of which will bespecifically re'- ferred to hereinafter, reference being had to theaccompanying drawings, in which Fig. 1 is a perspective view of the rearend ot' a lamp, and the plug connected attached to a wire but detachedtrom the lamp socket.

Fig. 2 is a disassociated perspective view otthe plug shell, the contactmemloer. the u'ire clamp ball, the pin for preventing-longitudinalmovementof the Contact member, and the end of the Wire.

Fig. 3 is a longitudinal sect-ional view [ln-(nigh the plug connecterwith the wire detached.

Fig'. 4 is asimilar view oit'. the Wire in clamping position.

Fig. is a cross sectional View through the plug connecter adjacent tothe contact securing pin. f

Fig. 6 is a cross sectional View through thc plug onneeter showing' the.hall out ot vwire clamping' position and Fig. 7 is a like view showingthe. ball in wire clamping position. J

The lamp 1 may be of usual cons ruct-ion with a socket i). to receivethe shell 3 of a plug connecter'. The shell 3 exterially may be of usualconstruction in that it may con'- sist of a cylindrical shell withoppositely disposed pins 4 and 5 to be received in the slots 6 and 7 inthe usual way for securing the plugs to the sockets of lamps. The shell3 may consist of insulating material such as hard rubber or the like. Itis shown yas having a longitudinal bore to receive an elongated Contactp1n9 with a longitudinal recess 10 therein, the wall of which isprovidedI with an'opening 11 through which a hall 12 may be introduced.The opening 11 coincides with a cam-shaped recess 13, that is, the Wallof the recess is eccentric to the Wall of the bore so that the ball canrecede into the deepest portion of the recess to per- 1925. Serial No.35,656.

i mit the end 14 ot an electrical conductor such as the n'ire 15 to beintroduced into the recess between the wall ot' the recess and wire intothe contact so that the current may be suppliedto the bulb 1G in thesocket 2 of the lamp 1. rl`he pin or member t) is held againstlongitudinal movement by a pin l which 1S driven into the opening 18 inthe shell of the plug. One end ot' the pin 17 is received in the annulargroove 19 in the pin` S). In the annular groove is a stop Wall Q()against which the pin 17 may contact. lfVhcn one end of the Wall 20 isagainst the pin, the opening 11 will be in register witlrthe recess y13so that the hall may be received in the-deepest portion ot the recess 13to per-Y mit the Wire to be introduced into the bore. Fn/example, if theend of a. screw-driver isfinserted in the slot 21 in the 'end ot the pi/9, and the pin is turned contra clockwise and the web or stop Q0contacts with thel pin 17 as shown in Fig. 5. the ball 12 may recedeinto the recess l?. and the end 1l ot the Wire may be pushed vup intothe recess l() between the Wall of the recess and the ball 1Q. as shownin Fig. it. VNon' vit' the pin 9 is turned in a clockwise direction theball 12 will ride on the wall ot' theirecess 125 and clamp the wireagainst the wall of the recess 10 as Shown in Fig. 4. so that the wirecan not he withdrawn, the camnnng action of ythe Wall of the'recess 13being sufficient to jam the movable wire-securing member or ball againstthe Wire to hold it in the recess l10; then when the plug@ is insertedin the socket in the lamp, the end 22 of the pin 9 will Contact with theend of the lamp bulb 16 to supply current to the filament thereof: inthe usual Way.

It will be apparent that the parts ot' the plug can be easilyconstructed and conveniently assembled` and that dangerot' the Wirebecoming disconnected from the contact pin 9 will be entirelyeliminated,`be

cause when the ball is forced against the cam surface of the recess 13it will be imbedded into the wire and the wire will have sufficientspring to hold the ball against slipping. L

Since the ball will make a depression in tbe wire as shown in Fig. 4,the wire cannot be easily pulled out ofthe plug. I prefer to use aspherical engaging member such as the ball 1Q, but I am aware that othertypes of movable members may be employed, so I do not wish to be limitedexclusii-'ely to the use of a .sphere Jfor maintaining intimate contactbetween the wire and the pin.

What we claim and desire to secure by Lettersdixl'ent is:

-l. A plug for electrical connecters, comprising a shell oi" insulatingmaterialprovided with a central bore having a, canishaped recessconnnunicating with the bore, a longitmlinally recesfed Contact memberin the shell, the longitudinally recessed portion of the contact memberhaving an opening in its wall to coincide With the cam-shaped recess, aball in the opening having a part in the cam-shaped recess and a part inthe recess in the contact member, the wall ot' the cam-shaped recessbein eective to force the ball into the recess in t e contact to impingethe ball against a conductor wire receivable in the recess in thecontact member, the contact member having an annular groove providedwith a stop web across it and a pin passing through the shell receivedin the groove to contact with the stop member.

In a plug for electrical connecters, an insulating shell having a radialchannel, a contact member rotatably disposed in said shell and having abore for the reception of a conductor wire, means for Wedging the wirein the contact member upon rotation of the contact member, the contactmember having an annular groove and a stop Wall limitingl said groove, apin in said radial channel ot the shell projecting into said groove andadapted to retain the contact member in the shell and to limit therotation of the contact member.

In testimony whereof we affix our signatures.

ARTHUR J. FROGUE. JAMES I. SLOAN.

